Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1239d4efea8408a…

MALICIOUS

PDF

62.5 KB Created: 2021-09-20 10:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 8634b4e69743bde4b22728325e432dd3 SHA-1: 852957839442e1667997a86b0590685ffd8df4e0 SHA-256: c1239d4efea8408a75f43832dfe6b90ddab97bef9775857b7712bee459a6f730
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a PDF containing a link farm, with multiple URLs pointing to potentially compromised websites or disposable domains. The ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95' strongly suggests a phishing or trojan distribution intent. While no scripts were explicitly extracted, the nature of the links and the ClamAV signature indicate a malicious payload delivery mechanism, likely initiated by a user clicking on one of the embedded links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3255

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://servicedental.it/userfiles/files/xexovevefowoza.pdf In PDF document text
    • https://libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/perasolemef.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/33207496577.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/26729143344.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/suronewifajotusos.pdfIn PDF document text
    • https://elperrocallejero.info/ckfinder/files/golilazinasolulabik.pdfIn PDF document text
    • http://yoron.net/up/files/73528225163.pdfIn PDF document text
    • https://oolong-dining-co.com/webroot/editor-uploads/files/xiduz.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f48453b9ff---mawegefejaw.pdfIn PDF document text
    • http://d2dgroup.net/upload/files/45568586413.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/famozusorazakegazelawu.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/2388400446.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///97317522752.pdfIn PDF document text
    • http://dentherapia.hu/files/file/paguwodezet.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/97061445020.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/4d902a31e6f72c946161ed3cf017a4da/fetewiseninoles.pdfIn PDF document text
    • https://gemicilojistik.com/userfiles/upload/file/tafulidojuta.pdfIn PDF document text
    • http://evolutionchonburi.com/userfiles/files/51368207211.pdfIn PDF document text
    • http://zh-huaxun.com/uploadfiles/files/zaxefirabelakemi.pdfIn PDF document text
    • https://jager-ig.tw/up_photo/file/vezikuzo.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/3191176adfbe4e14214cc34f3f8bfc05/73658545122.pdfIn PDF document text
    • https://vrrc.heart.net.tw/ckfinder/ckfiles/files/parixanatokumalo.pdfIn PDF document text
    • http://hanifeugur.com/image/files/63562525491.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/63585586613.pdfIn PDF document text
    • http://www.scea.edu.mn/ckfinder/userfiles/files/pozanenigiziserevovuzi.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cdf6447cc7---92293718511.pdfIn PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/jekerolemasadejagomi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=hitman+sniper+full+game+free+download+for+androidPDF link annotation

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